Is there anything about R134a that is better than R12?
Is there anything about R134a that is superior to R12 excluding the ability to satisfy the regulations and a relatively low cost of R134a only as a result of government regulations causing R12 price increase?
Relative to R12, R134a:
Sucks because:
Mixture of R134a and its lubricant has affinity for water.
The mixture don't get along with capillary tube as well as R12+mineral oil mixture.
Havea greater potentional of causing a cardiac arrhythmias.
Mixture of R134a+air can ignite under pressure.
If not of government bureaucracy and consequential scarcity increasing the price of R12, R134a costs more.
Higher head pressure, more stress on the compressor, higher leak rate.
Thermodynamic properties that are less desirable than R12.
It doesn't like high condenser temperature.
Rules because:
um.... I don't know.
.....
Does R134a really save the environment compared to R12 used in a responsible manner?
Re: Is there anything about R134a that is better than R12?
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Does R134a really save the environment compared to R12 used in a responsible manner? [/B]
I would defy anyone to show how R12 used in hermetic systems following best practice could have any significant impact upon the ozone layer.
Clearly, its use as an aerosol propellant, foam blower and in inherently leak-prone car systems had to be curtailed. I can see no reason why its use in hermetically sealed refrigeration units can't continue - except that it will never happen.
Too many people, including most politicians, don't like complexity. Like DDT, CFCs have now been declared "bad". In reality, it is overuse and improper use that is bad. The chemicals themselves have their place and usefulness if used responsibly.
I believe that a good economic case could be made for the use of R12 in hermetic systems. I don't see any financial rewards for making this case, though, and do not expect it to ever happen. The Europeans are happily using R600a in domestic refrigerators, and I believe this to be better than R134a.